As for the knowledge of thieves:
My car was (accidently) unlocked some day, with the empeg pulled out of the sled, and positioned plainly visible on the passenger seat, locked to the car with a notebook lock (Kensington, attached to the floor of the car, beneath the passenger seat). Well, when I got back to the car, I found a note on the empeg stating something like "Why do you lock such a cheap radio to the car?" Well, the VW alpha (cheapest radio VW sells with their cars) had still been in the car (this happened two days after my empeg install). Like I said: had been, the thieves did take that VW radio with them....

cu,
sven
(prod owner of a MkII 12GB blue now green, #080000113)